Polyamide (PA) ndi polima yokhala ndi magulu a amide obwerezabwereza pamaketani akulu.Nthawi zambiri amatchedwa Nylon, PA ndi amodzi mwamapulasitiki opangidwa kale kwambiri komanso ogwiritsidwa ntchito kwambiri.M'nkhaniyi lero,Qingdao Sainuozidzakutengerani kuti mudziwe mfundo khumi zosinthira nayiloni.

pp nsikwa Nayiloni yosinthidwa

Zapadera za nayiloni zimapangitsa kuti azigwiritsidwa ntchito kwambiri pamagalimoto, zida zamagetsi ndi zamagetsi, makina opangira, zida zamasewera, nsalu ndi zina zotero.Komabe, ndi miniaturization yamagalimoto, magwiridwe antchito apamwamba a zida zamagetsi ndi zamagetsi, komanso kuthamangitsidwa kwa zida zamakina opepuka, kufunikira kwa nayiloni ndi magwiridwe ake akuwonjezeka pang'onopang'ono.Chifukwa chake kusinthidwa kwa nayiloni ndikofunikira kwambiri.
Zinthu zofunika kuziganizira pakusintha nayiloni
1. Kuyika kwa kutentha kwa mbiya
(1) Chifukwa nayiloni ndi polima wa crystalline, malo ake osungunuka ndi odziwikiratu.Kutentha kwa mbiya ya utomoni wa nayiloni pakumangira jekeseni kumakhudzana ndi momwe utomoni umapangidwira, zida ndi mawonekedwe azinthu.
(2) Kutentha kwambiri kwa zinthu ndikosavuta kupangitsa kusintha kwa mtundu, brittleness ndi waya wasiliva, pomwe kutentha kwa zinthu zotsika kumapangitsa kuti zinthuzo zikhale zolimba ndipo zimatha kuwononga kufa ndi wononga.
(3) Nthawi zambiri, otsika kwambiri kutentha kutentha kwa PA6 ndi 220 ℃ ndi PA66 ndi 250 ℃.Chifukwa cha kusasunthika kwa kutentha kwa nayiloni, sikuli koyenera kukhala mu mbiya kwa nthawi yayitali pa kutentha kwakukulu, kuti asapangitse kusinthika ndi chikasu cha zipangizo.Panthawi imodzimodziyo, chifukwa cha madzi abwino a nayiloni, amayenda mofulumira pamene kutentha kumaposa malo ake osungunuka.
2. Kutentha kwa nkhungu
(1) Kutentha kwa nkhungu kumakhudza kwambiri crystallinity ndi shrinkage.Kutentha kwa nkhungu kumachokera ku 80 ℃ mpaka 120 ℃.Kutentha kwakukulu kwa nkhungu, crystallinity yowonjezereka, kuwonjezeka kwa kukana, kuuma, modulus ya elasticity, kuchepa kwa mayamwidwe amadzi, kuwonjezereka kwa nkhungu, koyenera kwa zinthu zakuda;
(2) Ngati khoma makulidwe ndi wamkulu kuposa 3 mm, Ndi bwino kugwiritsa ntchito nkhungu otsika kutentha ndi 20 ~ 40 ℃.Kwa zida zolimbitsa magalasi, kutentha kwa nkhungu kuyenera kukhala kopitilira 80 ℃.

3. Khoma makulidwe a mankhwala
Kutalika kwa chiŵerengero cha nayiloni ndi 150-200, makulidwe a khoma la chinthucho si osachepera 0.8mm, nthawi zambiri 1-3.2mm, ndipo kuchepa kwa chinthucho kumagwirizana ndi makulidwe a khoma la mankhwala.Kuchuluka kwa makulidwe a khoma, m'pamenenso kuchepa kwake kumakulirakulira.
4. Kutopa
Kusefukira kwa utomoni wa nayiloni ndi pafupifupi 0.03mm, chifukwa chake nsonga yotulutsa mpweya iyenera kuyendetsedwa pansi pa 0.025.
5. Wothamanga ndi chipata
Bowo la chipata sikuyenera kukhala lochepera 0.5T (t ndiye makulidwe a gawo la pulasitiki).Ndi chipata chomira pansi, kutalika kwa chipatacho kuyenera kukhala 0.75mm.
6. Magalasi odzaza CHIKWANGWANI
Popanga nayiloni, kuchepetsa kutentha kwa nkhungu, kuonjezera kuthamanga kwa jekeseni ndi kuchepetsa kutentha kwa zinthu kudzachepetsa kuchepa kwa nayiloni pamlingo wina, kuonjezera kupsyinjika kwamkati kwa chinthucho ndikupangitsa kuti zikhale zosavuta kupunduka.Mwachitsanzo, shrinkage ya PA66 ndi 1.5% ~ 2%, kuchepa kwa PA6 ndi 1% ~ 1.5%, ndipo shrinkage imatha kuchepetsedwa mpaka 0.3% mutawonjezera zowonjezera zowonjezera zamagalasi.
Zochitika zenizeni zimatiuza kuti ulusi wagalasi ukawonjezeredwa, m'pamenenso utomoni wa nayiloni umakhala wocheperako.Komabe, ngati ulusi wagalasi uwonjezedwa kwambiri, umayambitsa ulusi woyandama pamwamba, kusalumikizana bwino ndi zotsatira zina.Nthawi zambiri, zotsatira za kuwonjezera 30% zimakhala zabwino.
7. Kugwiritsa ntchito zinthu zobwezerezedwanso
Ndibwino kuti musapitirire katatu kuti mupewe kuwonongeka kwa mankhwala kapena kuchepa kwa thupi ndi makina.Kuchuluka kwa ntchito kuyenera kuyendetsedwa pansi pa 25%, kuchulukirachulukira kungayambitse kusinthasintha kwa zinthu, ndipo kusakaniza kwa zinthu zobwezerezedwanso ndi zida zatsopano ziyenera kuuma.
8. Malangizo a chitetezo
Pamene utomoni wa nayiloni wayambika, kutentha kwa mphuno kuyenera kuyatsidwa poyamba, ndiyeno kutentha kuyenera kutenthedwa mu mbiya yodyera.Pamene nozzle yatsekedwa, musamakumane ndi dzenje la kutsitsi, kuti muteteze kumasulidwa kwadzidzidzi kwa kusungunula mu mbiya yodyera chifukwa cha kuthamanga kwa magazi, zomwe zingayambitse ngozi.

9. Kugwiritsa ntchito womasulira
Kugwiritsa ntchito pang'ono kutulutsa nkhungu nthawi zina kumatha kusintha ndikuchotsa kuwira ndi zolakwika zina.Zotulutsa za nayiloni zimatha kukhala zinc stearate ndi mafuta oyera, kapena osakanikirana ndi phala.Kuchuluka kwa wothandizira kumasulidwa kuyenera kukhala kochepa komanso kofanana kuti tipewe zolakwika zapamtunda.Chomangiracho chiyenera kukhuthulidwa makina akatsekedwa kuti misala isasweke pakapangidwe kotsatira.

10. Post mankhwala
(1) Zinthuzo ziyenera kutenthedwa pambuyo popanga
Njira wamba mu mafuta amchere, glycerin, parafini yamadzimadzi ndi madzi ena otentha otentha, kutentha kwa kutentha kuyenera kukhala 10 ~ 20 ℃ kuposa kutentha kwakugwiritsa ntchito, ndipo nthawi yochizira imadalira makulidwe a khoma la mankhwalawa.Makulidwe apansi pa 3 mm ndi 10 ~ 15 min, makulidwe ndi 3 ~ 6 mm, ndipo nthawi ndi 15 ~ 30 min.mankhwala pambuyo mankhwala kutentha ayenera pang'onopang'ono utakhazikika kutentha firiji, kuti kupewa kuzirala mwadzidzidzi kuchititsa m'badwo renso nkhawa mankhwala.
(2) Zogulitsazo ziyenera kuthandizidwa ndi kuwongolera chinyezi pambuyo pakuumba
Kuwongolera chinyezi kumagwiritsidwa ntchito makamaka pazinthu zomwe zimakhala ndi chinyezi chambiri.Pali njira ziwiri: imodzi ndiyo kuwiritsa chinyezi m'madzi;Wina ndi kunyowa kwa potaziyamu acetate aqueous solution (chiŵerengero cha potaziyamu acetate ndi madzi ndi 1.25:1, mfundo yowira 121 ℃).
Madzi otentha ndi osavuta, malinga ngati mankhwalawa aikidwa m'malo a 65% chinyezi, kuti athe kufika pamtundu wa chinyezi, koma nthawi yayitali.Kutentha kwa mankhwala a potaziyamu acetate amadzimadzi ndi 80 ~ 100 ℃, ndipo nthawi ya mankhwala makamaka zimadalira mankhwala khoma makulidwe, pamene makulidwe khoma ndi 1.5mm, za 2h, 3mm, 8h, 6mm, 16 ~ 18h.
Malingaliro a kampani Qingdao Sainuo Chemical Co.,Ltd.Ndife opanga sera PE, PP sera, OPE sera, EVA sera, PEMA, EBS, Zinc/Calcium Stearate….Zogulitsa zathu zadutsa REACH, ROHS, PAHS, FDA kuyesa.
Sainuo khalani otsimikiza sera, landirani kufunsa kwanu!
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